chr18-20970516-G-A

Position:

• chr18-20970516-G-A

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BS1 BS2

The ENST00000399799.3(ROCK1):​c.2655-3C>T variant causes a splice region, splice polypyrimidine tract, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00197 in 1,583,744 control chromosomes in the GnomAD database, including 56 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.0099 (31 hom., cov: 32)
  • Exomes 𝑓: 0.0011 (25 hom.)
• Consequence: ROCK1 ENST00000399799.3 splice_region, splice_polypyrimidine_tract, intron
• Scores: Splicing: ADA: 0.003395
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 2.41

Genes affected

ROCK1 (HGNC:10251): (Rho associated coiled-coil containing protein kinase 1) This gene encodes a protein serine/threonine kinase that is activated when bound to the GTP-bound form of Rho. The small GTPase Rho regulates formation of focal adhesions and stress fibers of fibroblasts, as well as adhesion and aggregation of platelets and lymphocytes by shuttling between the inactive GDP-bound form and the active GTP-bound form. Rho is also essential in cytokinesis and plays a role in transcriptional activation by serum response factor. This protein, a downstream effector of Rho, phosphorylates and activates LIM kinase, which in turn, phosphorylates cofilin, inhibiting its actin-depolymerizing activity. A pseudogene, related to this gene, is also located on chromosome 18. [provided by RefSeq, Aug 2015]

ACMG classification

Verdict is Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.48).
• BP6: Variant 18-20970516-G-A is Benign according to our data. Variant chr18-20970516-G-A is described in ClinVar as [Benign]. Clinvar id is 777282.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00995 (1515/152264) while in subpopulation AFR AF= 0.0343 (1427/41554). AF 95% confidence interval is 0.0329. There are 31 homozygotes in gnomad4. There are 699 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High AC in GnomAd4 at 1515 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ROCK1	NM_005406.3	c.2655-3C>T		splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant		ENST00000399799.3	NP_005397.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ROCK1	ENST00000399799.3	c.2655-3C>T		splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant		1	NM_005406.3	ENSP00000382697	P1
ROCK1	ENST00000635540.2	c.2655-3C>T		splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant, NMD_transcript_variant		5		ENSP00000489185
ROCK1	ENST00000583556.1	n.117-3C>T		splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant, non_coding_transcript_variant		5

Frequencies

GnomAD3 genomes AF: 0.00997 AC: 1517 AN: 152146 Hom.: 31 Cov.: 32

Gnomad AFR AF: 0.0344

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00425

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000118

Gnomad OTH AF: 0.00813

GnomAD3 exomes AF: 0.00297 AC: 720 AN: 242822 Hom.: 13 AF XY: 0.00222 AC XY: 292 AN XY: 131396

Gnomad AFR exome AF: 0.0368

Gnomad AMR exome AF: 0.00302

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000344

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000162

Gnomad OTH exome AF: 0.00239

GnomAD4 exome AF: 0.00112 AC: 1606 AN: 1431480 Hom.: 25 Cov.: 29 AF XY: 0.000986 AC XY: 700 AN XY: 710100

Gnomad4 AFR exome AF: 0.0381

Gnomad4 AMR exome AF: 0.00294

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000244

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000714

Gnomad4 OTH exome AF: 0.00250

GnomAD4 genome AF: 0.00995 AC: 1515 AN: 152264 Hom.: 31 Cov.: 32 AF XY: 0.00939 AC XY: 699 AN XY: 74458

Gnomad4 AFR AF: 0.0343

Gnomad4 AMR AF: 0.00412

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000118

Gnomad4 OTH AF: 0.00804

Alfa AF: 0.00452 Hom.: 7

Bravo AF: 0.0117

Asia WGS AF: 0.00260 AC: 9 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Apr 04, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.48
CADD	Benign	13
DANN	Benign	0.60

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.0034
dbscSNV1_RF	Benign	0.36
SpliceAI score (max)		0.050		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs73959760; hg19: chr18-18550477;